Speed limiting device



M. L. MENNESSON SPEED LIMITING DEVICE Jan. 8, 1.952

Filed Sept. 28, 1945 5 Sheets-Sheet l //v VEN Tof? Var/rit? E E E L' E I s E E ENNESSO/V Jan. 8, 1952 M. 1 MENNESSON `SPEED LIMITING DEVICE sheets-sheet 2 Filed Sept. 28, 1945 D H ma@ AfA/mq .MEN/VESSON N* N .F

'AHORA/EY M. L. MNNEssoN SPEED LIMITING DEVICE Jan. s, 1952 3 Sheets-Sheet 3 Filed Sept. 28, 1945 Patented Jan. 8, 1952 UNITED STATES PATENT* OFFICE:

k2,582,052 n n SPEED LIMrrmG DEVICE Marcel 'Louis Mennessn, Neuilly-surg-Seine, France, assigner to Societe Solex, Neuilly# sur-'SheidFi-ace, a society of France 28, 1 945, Serial N9.

section 1, Public mw 690.. August e194@ i Patent eipiresfpecembex'f 23,1958 'l The present invention: rela-tes.. to .speed limiting mined modifications inthe lworking conditions' of the engine.

` Other objects o f the invention willv result-from the following detailed' description of lsome specificembodiments thereof with reference to the ac-v companying drawings, given merely by way of example, and in which:

Fig. l is a diagrammatic elevational view, partly in section, of a speed limiting device made according to the present invention, the parts being shown in the respective positions that correspond to the closing of the throttle valve;

Fig. 2 is a view similar to Fig. 1, showingthe parts in the positions coresponding to the opening of the throttle valve;

Fig. 3 is an elevational view of one of the control elements of this speed limiting device;

mg. 4 is a sectional view of a detail modification of the device of Figs. 1 and 2;

Fig. 5 is avieW similar to Fig. 1 showing a simplication of the embodiment illustrated by Fig. 1;

Fig. 6 is a view similar to Fig.j 1 showing fans,

other embodiment of a speed limiting device according to the invention;

Figs. 7 and 8 are views, similar to Figs. 1 vand 2 gine and that it is desired to provide this carburetor with a speed regulating device adapted to limit the speed of .this engine, and therefore 'of' the motor vehicle on which it is fitted, to a givenv maximum value.

The carburetorv may be of vany Vsuitable zoning.; (cx. isi-e139) same as thespeed regulating device proper: For

instance. it includes,- according to a known 'construction, a throttle valve Ijfreely and eccentrically mounted onits axis -2 and Ysuln'ected'to the, action of a. spring 3 which tends to open the valve by applying it against. an abutment el rigid with the memberv 5 through which said throttle valve is operated. Due to the'eccentric mounting of saidv throttle valve, the suction in the induction conduit 6 ofthe engine throughwhich the fuel is flowing in the upward direction (which suction yvari-es as `etfunction of -the speed of said engine) exertson the two portions of the throttle located respectively o n either side of itsaxis a diierential eif'et which tendsgto move the throttle toward the Vclosed position thereof when a. limit speed is exceeded, so as to bring baci; the engine Speed to the ,predetermined Value Witheet the driver having to modifythe position of control member 5- 1A ,Second abutment 42,- alSO prof vided on conlifDl member 5,limi-ts the angular displacement of the 'throttle toward the closedv position'thereof. Springs is xed, atone of its ends, to a part Tof adjustable ip osition and the other end .0f ,Said sprineis commited 't0 throttle l.. either .directivas shown .by ,Figs V7 and 8. or through the -inter-medi ate of a link 8 (Fig. i).

In the examples shown Yby Fiss. 1 t0 5. the ten.- sion of spring 3, which. as above stated, can be modified by displacing part 1, is influenced, under certain conditions, by displacements of the control member" 5 of the throttle, which \isvop' erated from a' distance Aby va pedal (not shown) an'darods.-v

The permanent adjustment" Qi spring 3Y is obtained through any ,Suitable means, including. in

the .examplefshbwn by the drawing. a "lever i3' (ng. ,zo adapted tp be actuatedby the 'driver and which acts. throughs' exible transmission, such as .a .cable i4 li110Vahle in its Sheath l5 Iupon ,an anni 6 adapted ,to move, throi'rgh a pinion `l 'l and` a rackl I 8, fa. sliding piece I9 on which part 'l is- ,According to .the present invention,A diaplacement of said part :11, insteadY of 'being Aensured only through the Aaction :of cable 14, voperatedfby means of lever I3, can also-be produc'edby certain displacements fof the throttle 'valve control mernf ber. w'Lhis-result -is` obtained, for' instance, by

of "tHe-end of sheath 1,5 so tively displaced in the d t e in.. e

' 3 out modifying in any way, at this time, the position of lever i3 or the like.

For this purpose, the end of sheath |5 is secured to a sleeve 20 adapted to slide axially in two bearings 2| and 22. This sleeve 20 is subjected to the action of a spring |21 which bears, on the one hand, on bearing 22 and, on the other hand on a iiange 23 of said sleeve. The body of the carburetor includes a pivot 24 about which can rotate a finger 25 held in contact withvsleeve 20 by a spring 26. The oscillation axis of finger 25 is at right angles to the sliding axis-of sleeve 20 in bearings 2| and 22.

The connection between control member 5 and iinger 25 may be constituted by any suitable means, for instance by a rod 21 one endof whichis fixed to a part 28 freely pivoted-,to iinger 25.

while the other end of said rod is freelyslidable in another part 29 pivoted to control member 5. A shoulder 30 provided on rod 21 limits the sliding displacements thereof in part 29, and this shoulder is so positioned that throttle canbe moved in the usual manner between its closed position (Fig. l) and the position thereof .for which the limit speed to which the device is adjusted is reached. Between these extreme positions, the speed regulating device works in normalfashion. When throttle I comes into a position corresponding to the above mentioned limit speed of regulation, or even a little before or a little after the throttle has reached this position, part 29 comes into contact with shoulder 3B. From this time on, when the driver further de presses the throttle pedal, he pushes back finger 25 and sleeve 20, which compresses spring |21 iny a perceptible manner. i This displacement vof sleeve has for its effect to displace in the same direction cable |43 and armVV I6, whichv suddenly increases the tension of spring 3 and permits a.

For this position of .the throttle, this spring has returned all the parts totheir positions corresponding to the normal limit speed of regulation. When it is desired to 4reduce the,V resistance opposed by springY |21 to the movement of thel throttle pedal, the arrangement of Fig. 4 may be employed. In this case, sleeve V2|) is provided with a groove 34 adapted to accommodate a lb`all"3|L urged toward the bottom` of said groove vby a spring 32 housed in a radial hole 33 provided in bearing 22. pressing the throttle pedal, perceives, when finger starts being pushed back by rod 21, a resistance due to ball 3| which tends to remain in'v groove 34. Once the ball has been driven out of said groove, this resistance disappears, and there only remains the reaction of springV |22, which canbe chosen much smaller than that lof theV spring |21 of Figs. 1 and 2. It has been above stated that part 2'9- may,

if so desired, come ,into contact with shoulder a little before or a little after throttle 3 has,

reached aV position of opening corresponding to, the normal speed of regulation. V- V When this contact takes 'place alittle before". this position is reached, theV 'engine can" WQIK-f In this caseythe driver, when de- 4 high speeds with the maximum power only when the driver exerts a supplementary effort on the throttle pedal for pushing back sleeve 20 against the action of spring |21, thus increasing the tension of spring 3vand permitting full opening of the throttle, as above explained. rThe resistance opposed to the full opening of the throttle (spring I21 or |22) may be disagreeable for the driver when the latter decides to run the vehicle at maximum speed whenever this is possible.A f

In this case, it may be interesting to have the elastic abutment (sleeve 20 with its spring |21 or |22) pushed backfpermanently and iiidepend- 'ently of the 'action of the throttle control means when the driver lbrings control lever I3 (Fig. 3) in the position corresponding to the highest value of the speed of regulation. For this purpose, I

f may, for instance, provide between arm |6 and sleeve 20, asuitable connection, either direct or indirect, for instance through link means and finger 25.

With this arrangement, when cable |4 brings arm |6 in the positionY corresponding to the maximum speed, this arm simultaneously pushes back finger 25 and suciently compresses spring |21 for enabling the driver fully to open throttle (Fig. 2) without having topovercome the supplementary resistance of the elastic abutment constituted by sleeve 20 and spring |21 or |21.

On the contrary, when part 29 comes into contact with shoulder 30 `after 'the throttle has' reached the position of maximum opening to which the device is adjusted, the device above described isno longer necessary, but two distinct abutments must be provided for throttle and control member 5, respectively, these two abutd ments being successively brought into action.

In Fig; 5, I have shown a simplified arrange-A l, mei'it according to which finger 251, which is controlled by the rod 211 on which the cciitroi arm 5 of throttle acts, does not displace sleeve 201 to which is fixed'the's'heath |5 of cable |11, 'but directly the element lof retracting spring' S;

. For this purpose, I'dispo'se arin 255l on a ixed pivot f 35 insuch manner that its free end is in con-J tact with an 'abutment 36 vprovided on a rod il? rigid with the element of spring 3. A springl |23 wound 'about said'rod 31, bears againstY a shoulder 38 thereof andaxed point 39 of' the apparatus body. This 'spring opposes a certain resistance to the displacement of rod 37. this arrangemenmthe tension of spring 3 is increased when rod 2I1'is moved byv arm 5 toward the right'of the drawingV and when part 291, cai'- ried. by"arm 5, comes into contact with the shoulder 301 of rod 271 which then pushes element 281 carried-by arm 251.A Y

' `This -system therefore works in a manner analo= gous to that above described but withouthaving 6o any action on the control means ifi-i", since the `axial displacement of rod 3'| by ri'ger 251 does not inuence the position of arm i6 in view' of the-fact that part I9 'can slide freely in the part that carries the rack.

Fig. 6 shows another embodiment in which arm vI5 (or a finger analogous to 251 in the embodiment of Fig.V 5) is moved by means of a Bowden cable 49 (analogous to cable Is of the above described embodiments) movable in its.A sheath 4| and provided with a return spring 42, or

position corresponding to theworking ,of a given' gear' combination, for instantie, hi immediately With below top'gear (direct '.riye'); 'This movable part maybe made rigid vwith the gear box lever 44 or be urged toward activeposition 4bythesliding gears that are brought .into play for this gear 'combina'- tion, whereby cable Aand arm IB are vmovedfto-t ward the 'right when Asaid gear combination'is brought rinto play Aby .means Iof ilever-44.-."'v When lever 44 is. moved laway from .thispositic/m, the action on cable y4l) ceases and armil automate. cally returns .into itsinitial position under :the action-.of return spring 42. L Owingto: this arrangement. the.:.driv.er,.when the vehicle is in top rgearfcannnt.exceedfthe-speed of regulation determined-.by the adjustment yof retracting spring 3. .But when iherchanges" to a lower gear, the third one :for instance1 he auto. matically obtains, through thezioperation'fofthe gear lever.44, or through the resulting displace--V ment of `certain elements ofxg'earfboxt, an increase of the. tensionA .of `said .spring .3 which` ,per-i mits aV higher speed ofv .the :engine and ,accorde ingly venablesthe 'driver'gto run thevehicleat a speed which maybe approximatelyfequalto the maximumfspeed'ab'oveymentioned. j, Instead of making use` .of the. throttle pedal or the gearboxr .for temporarily `increas.ing.pth'e tension of vretracting spring 3 vand consequently the speediof regulation, I `vxriay.-according tofthe invention, utilize any other vpart thedispljacee ments yof which :influence the working of'the engine. "c .i -In Figs.r 'and-8grz1ihave-shown another ein?. bodiment ofthe means; operative "by the throttle pedal, ',for, permitting of temporarilyK exceeding the maximum speed` of regulation, when so de sired.- f In this case, `Iy provide., I for instance gon throttle valve I-an abutment 4,5 adapted to come into. yContact with the wan .of the carburetor body' when saidA .throttle valve is rvin the i fully opened position. As in the preceding "embodi- .I,

ment, springt,l which tends tojopen throttle l, keeps said throttle applied against an abutment 41 provided on control member 5." 'A- second abutment` 42, provided on the same member, is mounted in a position such that it permits angular displacement ofA throttle I toward' the closed posi'- tion thereof asy long y'as 'the regulating device is Workingnormally. Y v

f Controlmember 5 is provided` with afngeror projection IU, adapted tor cooperate withayieldinglabutment constituted bya sliding rodi I'v subjected to the action of a .springi which yieldingly opposes the thrust exerted'by finger I0 on rod Il'. vlThe amplitude-.of movement of .control` ing rod Il are chosen in such manner as to obtain the following operation of the device.

When control member 5 is operated so as to displace, in the usual manner, throttle l from the. position (shown in dotted lines in Fig. '7) for which said throttle is closed toward that (shown in solid lines in Fig. 7) for which said throttle occupies the fully opened position (abutment 45 being then in contact with the wall of the carburetor body) and the engine is running, the speed regulating device works normally.

When control member 5 is in the last mentioned position (which permits full opening of the throttle, linger I0 is brought into contact with sliding rod Il, as visible on Fig. 7. For this position of control member 5, the suction in the carburetor induction passage causes the throttle to close more or less in accordance with very principle of the regulating device.

If the driver wishes to exceed the limit speed thus determined, he exerts @stronger effort on 6 part 9, through the'throttle pedal "and'nnger I0 drives back sliding `rod :I I' against the 'action of spring l2.' lControl memberf5 then vcomes into the position shown by Fig. .8 i thus positively holding the throttle in the #fully opened position ,by means ofrabutments 41 and 42, the action of ywhich` is substitutedl tothat of spring 3. When the .throt tle pedal is fully pressed down, the throttle cannot undergo any closing displacement under the erect of the suction because it is positively held by abut, ments 4.1,and 42. If this supplementary displace-- ment of control `member 5 is not complete, throttle II canV still `'close partly to a limited degree under theseifec't of said suctionand against the .action of spring 3 since, in this case, abutments 41 and 42 occupy an intermediate position between those shown by Figs. 7 and 8. When the driver permits member .5 to :comeback to lthe .position shown by Fig. '7,v for which spring vI2 is .not.compressed. the regulating device can normal conditions;

Fig.9 shows a modication according to which rod .-9, which is-.operatedlthrough the ,throttle pedal, 5 racts onthe control member 5 of throttle Io't, directly, as in the preceding example, but through the intermediate of amplifying means, forinstancea bent lever 46 mounted on a fixedpivot 41- and linked at 48 to rod 9. 'Ihe other end of lever 46 is lcaused to act on. aroller 49 mounted on the xfree Tend of arm.. 5. In. order ytofkeep. roller 49 in cont-act with .bent .lever 46, said roller may be -enga-'ged in a guiding vslot.5Il .provided in saidle've'r.` l j. .f :Byfthu's `transmitting .the movementof vthe throttleupedallrod) tothrottle I, during normal operation orfthispedal, lever 46 actsuponcontrol. member' 5 with 'a relatively small lever-arm, whichpermits' of operating the throttle lwith the desired--sensitiveness; .and especially.. when the throttle is but little opened. On the contrary. when :the pedal is moved beyond the .position -for which fthe throttle isv fully opened, ingorder to obtain fitsfforced opening, .lever 46 acts uponarmfwith'avlevef arm whichlis considerably greater so that it suili'cie's 'to move the pedal through'a relatively Y'small 'angle for obtaining the. forced penmgbf @morue l; v1'rue subpiementarydie'. placement of thelthrottle pedal 'can therefore be madevery small. d I 1n af'general manner, while I have, in the above description,V disclosed 'what I-` deem to be practical andl eilicientjembodiments ofthe present inventin. itsshoulgfl, bef .Well 'undrstod thet "do not Wish to. be f limited .thereto these. might 'be' char'rges 'madewiri the arrangement, dispositionand form of the parts without departing from the principle of the present invention as comprehended within the scope of the appended claims.

What I claim is:

1. In a speed regulating device for an internal combustion engine having an induction pipe, an unbalanced throttle valve in said induction pipe mounted responsive to the suction of the engine acting in a direction tending to move said valve toward its closed position, elastic means for yieldingly opposing the action orf suction on said valve, control means for actuating said throttle valve, said valve being connected with a given play with said control means, and means operatively connected with said control means for exerting a'supplementary opening action on said valve in response to displacements of said control means in the valve opening direction beyond the position of said control means nearest the valve closing position which permits. the .maximum opening oil again work s under said :valve'under the eiects ofthe opposed actions y of said elastic means and said suction, and spring means resisting movement of such control means in yvalve opening direction during such displacementsy only. i

2. .In a speed regulating device for an internal combustion'engine having an induction pipe, an unbalanced throttle valve insaid induction pipe mounted responsive to the suction of the engine acting in a `direction tending to move said valve toward its closed position, elastic means for yieldingly opposing the action of suction on said valve, control means for actuating said throttle valve, said valve being connected with a given play with said control means, and means operatively connected with said control means for increasing'the tension of said elastic means in response'to displacementsv of said control means beyond a given position in the valve openingdirection. i i

1 3.'In a speed regulating device for an internal combustion engine having an induction pipe, an unbalanced throttle valve` in said induction pipe mounted responsive to the suction of the engine acting in a direction tending to move said valve toward its closed position, elastic means for yieldingly opposing the action of suction on said valve, control means for actuating said throttle valve, said valve `being connected with a given play with saidl control means, resilient means for yieldngly opposing displacements of said control means beyond a given position in the valve opening direction, and means operatively connected with said control means for increasing the tension of said elastic means in response to displacements of said control means beyond said position.

4. In .a speed regulating device for an internal combustion engine having an induction pipe, an unbalanced throttle valve` in said induction pipe mounted responsive to the suction of the engine acting in a direction tending to move said valve toward its closed position, elastic means for yieldingly opposing the action of suction on said valve, controlV means for actuating said throttle valve, said valve being connected with a given play with said control means, manually operable means for adjusting said elastic means, and means operativelyv connected with said control means for operating said adjusting means to increase the tension of said elastic means in response to displacements of said control means beyond a given position in the valve opening direction. Y 5, In a speed regulating device for an internal combustion engine having an induction pipe, an unbalanced throttle valve in said induction pipe mounted responsive t vthe suction of the engine acting'ln -a'zdirection tending "to" move said valve' towardits closed' position, elastic means for yieldingly opposing the action of suction on said valve.

control means for actuating said 'throttle valve, said valve being connected with a given play with said control means, resilient means'for yieldingly opposing 4displacements of A said control means beyond a given position in the valve opening direction, manually operable means for adjusting said -selastic means, andomeans operatively connected with said control means for Voperating said adjusting means to increase the tension of said elastic means inresponse to displacements of said control means beyond said position.

6. In a speed' regulating .device for an internal combustion engine having an induction pipe, yan unbalanced throttle valve'in said induction pipe mounted responsive to the suction of the engine actin-g in a direction tending to move said valve toward its closed position,'elastic means for yieldingly opposing the action of suction on said valve, control means for actuating said throttle valve, said valve being connected with a given play with said control means, abutmentmeans operatively connected with said control means for forcing said throttle valve open against the action of said suctioniin response to displacement of said control means in the valve opening direction beyond the position of said control means nearest the valve closing position which permits the maximum opening olf said valve under the eiects of the opposed actions of said elastic means and said suction, and spring -means resisting movement of such control means in valve opening direction during such displacements only.

7. In a device as granted in claim 6, the transmission between said control means and said abutment means being adapted to insure a variable amplication increasing with the amplitude of said displacements.

. l MARCEL LOUIS MENNESSON.

REFERENCES CITED Y The followingreferences are of record in the le of this patent:

Y, UNITED STATES PATENTS Y Number Name Date 11,250,215)A vPharo Dec. 18, 1917 1,788,403 Moyers et al. e Jan. 13, 1931 2,242,832 VMennesson May 20, 1941 FOREIGN PATENTS Country. Date Number Y I Great Britain July 4, 1935 

